飞思卡尔HCS12里的定时和计时的方案,列出例子,以供参考.RTI,这个不额外占资源,以晶振为参与钟,方便,难精确-Freescale HCS12 s timing, and timing of the program, listing examples for reference. RTI, this does not account for additional resources in order to participate in crystal bell, convenient and